Device for regulating the quantity and composition of gas mixtures



Feb. 24, 1931. A GRMBERG 1,793,608'

DEVICE FOR REGULATING THE QUANTITY AND` COMPOSITION OF GAS MIXTURES Filed Aug. 22, 1928 gin/vernici Patented Feb. 24, 1931 UNITED STATES PATENT OFFICE ANTON GRAMBERG, OF FRANKFORT-ON-THE-MAIN, GERMANY, ASSIGNOR TO I. G. FARBENINDUSTRIE AKTIENGESELLSCHAFT, OF FRANKFORT-ON-THE-MLAIN, GER- ZMIANY, A CORPORATION 0F GERMANY './EVICE FOR REGULATING THE QUANTITY AND COMPOSITION OF GAS MTXTURES Application filed August 22, 1928, Serial No.

This invention relates to a device for regulating the 'quantity and composition of a mixture ot gases supplied under constant pressure, and is particularly applicable for use in administering gas for producing narcosis in surgical operations. i

The manipulation of devices proposed hithl erto Jfor this purpose has been hampered by the fact that for the purpose of regulating both the quantity and the composition of the mixture oic gases several separately placed elements had to be manipulated, so that in the case, for instance, vof administering the narcotic incorrect dosing was liable to occur.

According to this invention 4the quantity and composition of the mixture are regulated by two manipulating devices mounted close to each other in a manner which renders control easy and permits continuous variation of the quantity and composition.

The device comprises a separate valve for each gas. These valves are connected at points, spaced apart, with a sliding block mounted so that it can be turned on a centre and capable of being displaced relatively to y this centre in such a manner that the said points can be brought into coincidence with the centre. The centre may be an axis on which turns the frame wherein the block slides. The position of the block in relation to the centre determines the proportion in which the gases mix, while the angular position of the frame on the axis determines the quantity of the mixture.- When the point of connection of a valve with the block is coincident with the centre, that valve is closed; in any other position of the points the valves are open in a certain ratio.

These relationships remain constant while the posit-ion of the block in the frame remains the same, and angular movement of the frame merely varies the quantity of gases permitted to pass by the valves.

The accompanying diagrammatic drawings illustrate one mode of construction of the device in two dierent positions of the parts.

A1 and A2 are the inlets for the two gases, which may be called G1 and G2 and are supplied under a pressure asconstant as possible.

301,334, and in Germany August 24,1927.

The gases pass by Way of valves V1.and V2 to the mixing pipe C, connected' for instance with a inhaling mask.

The needles N1, N2 are connected by rods Ml, M2 respectively with the pins P1, P2 on the block S which slides in the frame R and can be displacedtherein by the hand-Wheel Q. In one of the extreme positions of the block the pin P1 coincides with the axis D on which the frame turns, While in the other extreme position the pin P2 so coincides, as in Fig'l. The arm H serves as a handle to turn the frame.

As shown in Fig. l valve V2 is closed; it will remain closed when the frame R is turned on its axis to vary the passage through valve V1. Thus in this position of block S gas G2 cannot pass valve V2 and turning the frame will only vary the quantity of gas G2 which flows through pipe C.

In Fig. 2 the position of the block S is such that the operation of turning the frame will open or close both valves to the same extent.

It will be seen that when the position of the block has been fixed the proportion of gas G1 to gas G2 in the mixture remains constant whatever quantity is being passed by moving the frame. On the other hand, when the position of the frame will be lixed, the quantity of the gases G1 and G2 remains constant whatever proportion o both gases is required by handling the block.

It is advisable to limit the movement of the .frame R by fixed stops, lest Want of breathing gas may bring danger to the life of the patient, or, on the other hand, lest no more gas than wanted may be wasted. There will, however, generally be no such limiting stop for block S, it being desirable that the proportion of the gases can be varied to such an extent that either of the gases is excluded and the other passes pure.

I claim:

1. A device for regulating the quantity and composition of a mixture of two gases each supplied under constant pressure comprising a separate needle valve for each gas, the needles of which are connected at points spaced apart with a sliding block mounted so that it can be turned around a center lying within the sliding block, the block being independently displaceable relatively to this center.

2. A device for regulating the quantity and composition of a mixture of two gases each supplied under constant pressure comprising a separate needle valve for each gas, the needles of which are connected at points spaced apart with a sliding block, a frame in which the block slides, an axle in the middle of the frame, the frame being movable together with the sliding block around this axle and the sliding block being displaceable relatively to the center lying Within the sliding block.

3. A device for regulating the quantity' and composition of a mixture of two gases each supplied under constant pressure comprising` a separate needle valve for each gas, the needles of which are connected at points spaced apart byrods and pins on a sliding block, a frame in which the block slides, an axle in the middle of the frame, the frame being movable together with the sliding block around this axle and the sliding block being 'displaceable relatively to the center lying within the sliding block.

Y 4. A device for regulating the quantity and composition of a mixture of two gases each supplied under constant pressure comprising a separate needle valve for each gas, the needles of which are connected at points spaced apart with a sliding block, a frame in which the block slides, an axle in the rmiddle of the frame, the frame being movable together with the sliding block around this axle and the sliding block being so far displaceable at both sides relatively to this center that each of both points at which the rods act may coincide with the center.

5. A device for regulating the 4quantity and composition of a mixture of two gases each supplied under constant pressure comprising a separate needle valve for each gas, the needles of which -bein'g connected at points spaced apart with a sliding block, a

l frame in which the block slides, an axle in the ,middle of the frame, the frame being movable together with the sliding .block around this axle and the sliding block being so far displaceable at both sides relatively -to this center that each of both points at which the rods act may coincide with the center, a

device for turning the frame around the axle and a device for adjusting the sliding block in the frame, these manipulating devices being mounted close to each other.

In testimony whereof, I aiiix my signature.

ANTON GRAMBERG. 

